You can still buy the Stag, just take the gun to a gun smith have them take the barrel off, then put on a short barrel on it and register it to the lower receiver. You can get/order short barrels from most gun stores that specialize in AR's. You could probably even trade the barrel you are taking off the gun towards a short barrel. Impact Guns and Get Some Guns come to mind. I know a few guys that have done this.